Interface Engineering for Highly Efficient Organic Solar Cells

Advanced Materials, Год журнала: 2023, Номер 36(16)

Опубликована: Март 3, 2023

Organic solar cells (OSCs) have made dramatic advancements during the past decades owing to innovative material design and device structure optimization, with power conversion efficiencies surpassing 19% 20% for single-junction tandem devices, respectively. Interface engineering, by modifying interface properties between different layers OSCs, has become a vital part promote efficiency. It is essential elucidate intrinsic working mechanism of layers, as well related physical chemical processes that manipulate performance long-term stability. In this article, advances in engineering aimed pursue high-performance OSCs are reviewed. The specific functions corresponding principles summarized first. Then, anode layer, cathode layer interconnecting devices discussed separate categories, engineering-related improvements on efficiency stability analyzed. Finally, challenges prospects associated application emphasis large-area, high-performance, low-cost manufacturing.

Язык: Английский

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Improved photovoltaic performance and robustness of all-polymer solar cells enabled by a polyfullerene guest acceptor

Nature Communications, Год журнала: 2023, Номер 14(1)

Опубликована: Апрель 22, 2023

Abstract Fullerene acceptors typically possess excellent electron-transporting properties and can work as guest components in ternary organic solar cells to enhance the charge extraction efficiencies. However, conventional fullerene small molecules suffer from undesirable segregation dimerization, thus limiting their applications cells. Herein we report use of a poly(fullerene- alt -xylene) acceptor (PFBO-C12) component enables significant efficiency increase 16.9% for binary 18.0% all-polymer Ultrafast optic optoelectronic studies unveil that PFBO-C12 facilitate hole transfer suppress recombination. Morphological investigations show blends maintain favorable morphology with high crystallinity smaller domain size. Meanwhile, introduction reduces voltage loss light stability mechanical durability flexible devices. This demonstrates introducing polyfullerenes is an effective approach achieving highly efficient good robustness.

Язык: Английский

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Stability of organic solar cells: toward commercial applications

Chemical Society Reviews, Год журнала: 2024, Номер 53(5), С. 2350 - 2387

Опубликована: Янв. 1, 2024

Organic solar cells (OSCs) have attracted a great deal of attention in the field clean energy due to their advantages transparency, flexibility, low cost and light weight. Introducing them market enables seamless integration into buildings windows, while also supporting wearable, portable electronics internet-of-things (IoT) devices. With development photovoltaic materials optimization fabrication technology, power conversion efficiencies (PCEs) OSCs rapidly improved now exceed 20%. However, there is significant lack focus on material stability device lifetime, causing severe hindrance commercial applications. In this review, we carefully review important strategies employed improve over past three years from perspectives design engineering. Furthermore, analyze discuss current progress terms air, light, thermal mechanical stability. Finally, propose future research directions overcome challenges achieving highly stable OSCs. We expect that will contribute solving problem OSCs, eventually paving way for applications near future.

Язык: Английский

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Solid Additive-Assisted Layer-by-Layer Processing for 19% Efficiency Binary Organic Solar Cells

Nano-Micro Letters, Год журнала: 2023, Номер 15(1)

Опубликована: Апрель 10, 2023

Morphology is of great significance to the performance organic solar cells (OSCs), since appropriate morphology could not only promote exciton dissociation, but also reduce charge recombination. In this work, we have developed a solid additive-assisted layer-by-layer (SAA-LBL) processing fabricate high-efficiency OSCs. By adding additive fatty acid (FA) into polymer donor PM6 solution, controllable pre-phase separation forms between and FA. This intermixed facilitates diffusion acceptor Y6 during LBL processing, due good miscibility fast-solvation FA with chloroform solution dripping. Interestingly, results in desired refined phase-separated domain vertical phase-separation structure better balance transport /collection dissociation. Consequently, binary single junction OSCs based on PM6:Y6 blend reach champion power conversion efficiency (PCE) 18.16% SAA-LBL which can be generally applicable diverse systems, e.g., PM6:L8-BO-based devices thick-film devices. The efficacy confirmed PM6:L8-BO, where record PCEs 19.02% 16.44% are realized for 100 250 nm active layers, respectively. work provides simple effective way control demonstrates promising methodology boosting industrial manufacturing

Язык: Английский

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Recent Developments of Polymer Solar Cells with Photovoltaic Performance over 17%

Advanced Functional Materials, Год журнала: 2023, Номер 33(14)

Опубликована: Янв. 22, 2023

Abstract With the emergence of ADA'DA‐type (Y‐series) non‐fullerene acceptors (NFAs), power conversion efficiencies (PCEs) organic photovoltaic devices have been constantly refreshed and gradually reached 20% in recent years (19% for single junction tandem device). The possess specific design concept, which greatly enrich NFA types excellent compatibility with many donor materials. It is gratifying to note that previously underperforming materials combine these regulated shine again. Nowadays, concept modular widely used research donors, injecting new vitality into field photovoltaics. Furthermore, also promote multicomponent devices, bilayer processing solvent engineering, additive engineering. Herein, latest progresses polymer solar cells efficiency over 17% are briefly reviewed from aspects active material design, interface development, device technology. At last, opportunities challenges commercialization future discussed.

Язык: Английский

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Effects of Halogenation of Small‐Molecule and Polymeric Acceptors for Efficient Organic Solar Cells

Advanced Functional Materials, Год журнала: 2023, Номер 33(22)

Опубликована: Фев. 23, 2023

Abstract Tuning the properties of non‐fullerene acceptors (NFAs) through halogenation, including fluorination and chlorination, represents one most promising strategies to boost performance organic solar cells (OSCs). However, it remains unclear how F Cl choice influences molecular packing between small‐molecule polymeric acceptors. Here, a series with different amounts types halogenation is synthesized, effects chlorination are investigated. It found that chlorinated lead longer exciton diffusion length better compared corresponding fluorinated ones, which attributes their stronger intermolecular mode. For polymer acceptors, in contrast, polymers achieve denser mode performance, because exhibit reduced intrachain conjugation end group moieties linker units. This study demonstrates on modes performances for provides important guidance molecule design high‐performance OSCs.

Язык: Английский

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Co-adsorbed self-assembled monolayer enables high-performance perovskite and organic solar cells

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Сен. 1, 2024

Self-assembled monolayers (SAMs) have become pivotal in achieving high-performance perovskite solar cells (PSCs) and organic (OSCs) by significantly minimizing interfacial energy losses. In this study, we propose a co-adsorb (CA) strategy employing novel small molecule, 2-chloro-5-(trifluoromethyl)isonicotinic acid (PyCA-3F), introducing at the buried interface between 2PACz perovskite/organic layers. This approach effectively diminishes 2PACz's aggregation, enhancing surface smoothness increasing work function for modified SAM layer, thereby providing flattened with favorable heterointerface perovskite. The resultant improvements crystallinity, minimized trap states, augmented hole extraction transfer capabilities propelled power conversion efficiencies (PCEs) beyond 25% PSCs p-i-n structure (certified 24.68%). OSCs CA achieve remarkable PCEs of 19.51% based on PM1:PTQ10:m-BTP-PhC6 photoactive system. Notably, universal also been achieved other two popular OSC systems. After 1000-hour maximal point tracking, encapsulated retain approximately 90% 80% their initial PCEs, respectively. introduces facile, rational, effective method to enhance performance SAMs, realizing efficiency breakthroughs both device structure, along improved operational stability. are essential high Here, authors develop molecule provide heterointerface, devices.

Язык: Английский

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Diffusion‐Limited Accepter Alloy Enables Highly Efficient and Stable Organic Solar Cells

Advanced Functional Materials, Год журнала: 2023, Номер 33(18)

Опубликована: Фев. 20, 2023

Abstract Organic solar cells (OSCs) are designed based on a blend of polymer donor and small molecular acceptor whereby the thermodynamic relaxation morphology raises concerns related to operational stability. Herein, it is demonstrated that classical Y6‐based binary device can be stabilized by using its derivative ZCCF3 as third component, which with replacing thiadiazole group Y6 trifluoromethyl substituted diazepine unit. delivers not only higher glass transition temperature ( T g ) than but also have hyper‐miscibility Y6, contributing favorable diffusion‐limited Y6:ZCCF3 alloy when blended donor. Consequently, champion power conversion efficiency 18.54% achieved in optimal PM6: Y6: devices, retain their 80% initial up 360 h. This study highlights importance high component derived hyper‐miscible accepter alloys achieving highly efficient stable OSCs.

Язык: Английский

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Batch-Reproducible and Thickness-Insensitive Mesopolymer Zwitterion Interlayers for Organic Solar Cells

ACS Energy Letters, Год журнала: 2023, Номер 8(6), С. 2689 - 2698

Опубликована: Май 23, 2023

Zwitterionic polymers or small molecules are a class of widely used interlayer materials in organic solar cells (OSCs). It is challenging to develop such that combine good film-forming property, high batch-to-batch reproducibility, and broad thickness processing window device applications. Herein, we designed synthesized two self-doped conjugated mesopolymer zwitterions (CMZs), namely, MT2PDIMz MT2PDINz (PDI = perylene-diimide, M mesopolymer, T2 dithiophene, Mz imidazolium zwitterion, Nz ammonium zwitterion). Both show processability effectively reduce the work function metal electrodes. The substitution cations with on side-chains can further modulate solution assembly self-doping effect CMZs, enabling improved interfacial compatibility active layers higher electron mobility MT2PDIMz. versatility CMZs interlayers for OSCs confirmed several binary ternary layers, affording efficiencies up 19.01%. Notably, over 98% optimal efficiency maintained as increases 40 nm reproducibility.

Язык: Английский

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Powering the Future: A Critical Review of Research Progress in Enhancing Stability of High‐Efficiency Organic Solar Cells

Advanced Functional Materials, Год журнала: 2023, Номер 33(50)

Опубликована: Авг. 21, 2023

Abstract Organic solar cells (OSCs) are a promising photovoltaic technology that employs organic semiconductor material as the photoactive layer, which has unique advantages of light weight, large‐area flexible fabrication, low‐cost, and semitransparent. In recent years, performance OSCs been significantly improved, highest power conversion efficiency exceeded 19%. Despite tremendous progress in OSCs, major bottleneck realizing commercialization is device stability. Therefore, reviewing research on stability high‐performance urgent necessary. This review discusses factors limiting lifetime, such metastable morphology, air, irradiation, heat, mechanical stresses. Additionally, this presents over last 5 focusing enhancing from perspective layers other functional layers, includes design engineering, solid additives, optimizing buffer using stable electrodes, encapsulation. Lastly, explores current challenges prospects, including advanced machine learning techniques to assist experimental research.

Язык: Английский

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